Scientific Visualization, 2018, volume 10, number 3, pages 34 - 44, DOI: 10.26583/sv.10.3.02
Application of optical methods for studying of heat resistance of composition materials
Authors: V.L. Kraynev1,A, A.A. Tikhonov2,B, P.K. Tretyakov3,A, A.V. Tupikin4,A, A.V. Chaplygin5,B
A Khristianovich Institute of Theoretical and Applied Mechanics, SB RAS, Russia
B Joint Stock Company Corporation Moscow Institute for Heat Technology, Russia
1 ORCID: 0000-0002-9279-4017
2 ORCID: 0000-0003-3662-802x, a04.tikhonov@yandex.ru
3 ORCID: 0000-0002-0850-6992
4 ORCID: 0000-0001-7109-3345, tupikin@itam.nsc.ru
5 ORCID: 0000-0001-9606-6095
Abstract
Composition materials are widely used in the aerospace equipment. Requirements to heat resistance are caused by the aerodynamic heating of surface growing up with increase in flight velocity of aircrafts. Optical methods can be applied to studying of some characteristics of materials when modeling full-scale parameters in ground units.
This work is devoted to studying the dynamics of changes of surface temperature and geometry of sample associated with ablation. Pyrometry and thermal imaging video recording were used for registration of the process. Information on influence of temperature and flow strength, testing time, and also recurrence of impact on change of surface deformation rate, ablation and possible destruction of the samples differing in structure material is obtained. The heating-up rate of the sample depends on the size and composition of the composite material. For various composite materials, two kinds of temperature change dynamics were observed – with heating up to temperatures above the flow temperature, or heating to a temperature slightly below the flow temperature. For a cylinder-sphere, a decrease in the longitudinal dimension on the flow axis versus time can be approximated by a linear function, for a plate the dependence is clearly nonlinear. Analysis of endurance tests showed that with increase in time the amount of ablation increases nonlinearly.
Keywords: supersonic high-temperature flow, composition materials, pyrometry and thermal imaging video recording, heat resistance.
